reward_set_visitor_impl.hpp

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#ifndef MLPACK_METHODS_ANN_VISITOR_REWARD_SET_VISITOR_IMPL_HPP
#define MLPACK_METHODS_ANN_VISITOR_REWARD_SET_VISITOR_IMPL_HPP

// In case it hasn't been included yet.
#include "reward_set_visitor.hpp"

namespace mlpack {
namespace ann {

inline RewardSetVisitor::RewardSetVisitor(const double reward) : reward(reward)
{
  /* Nothing to do here. */
}

template<typename LayerType>
inline void RewardSetVisitor::operator()(LayerType* layer) const
{
  LayerReward(layer);
}

inline void RewardSetVisitor::operator()(MoreTypes layer) const
{
  layer.apply_visitor(*this);
}

template<typename T>
inline typename std::enable_if<
    HasRewardCheck<T, double&(T::*)()>::value &&
    HasModelCheck<T>::value, void>::type
RewardSetVisitor::LayerReward(T* layer) const
{
  layer->Reward() = reward;

  for (size_t i = 0; i < layer->Model().size(); ++i)
  {
    boost::apply_visitor(RewardSetVisitor(reward),
        layer->Model()[i]);
  }
}

template<typename T>
inline typename std::enable_if<
    !HasRewardCheck<T, double&(T::*)()>::value &&
    HasModelCheck<T>::value, void>::type
RewardSetVisitor::LayerReward(T* layer) const
{
  for (size_t i = 0; i < layer->Model().size(); ++i)
  {
    boost::apply_visitor(RewardSetVisitor(reward),
        layer->Model()[i]);
  }
}

template<typename T>
inline typename std::enable_if<
    HasRewardCheck<T, double&(T::*)()>::value &&
    !HasModelCheck<T>::value, void>::type
RewardSetVisitor::LayerReward(T* layer) const
{
  layer->Reward() = reward;
}

template<typename T>
inline typename std::enable_if<
    !HasRewardCheck<T, double&(T::*)()>::value &&
    !HasModelCheck<T>::value, void>::type
RewardSetVisitor::LayerReward(T* /* input */) const
{
  /* Nothing to do here. */
}

} // namespace ann
} // namespace mlpack

#endif